Silver Bullet Data Services Group PLC As part of the Group's 4D roll out strategy, Umberto Torielli, Silverbullet Co-Founder and Group Chief Strategy Officer, will assume the role of 'General Manager 4D'. In this role, Umberto will lead the roll out of the 4D product alongside the Group's Chief Operating Officer and Chief Client Officer Kristen Kelly. Mark Pearlstein, previously Chief Revenue Officer, will assume a general strategic advisory role going forward.